Univik Email Converter

Universal Email Client Support

Convert emails from Thunderbird, Outlook, Gmail, Apple Mail, Yahoo Mail, Windows Live Mail, Zimbra, SeaMonkey, Postbox, eM Client and 50+ email clients.

Multiple Input File Formats

Import MBOX, EML, EMLX, PST, OST, MSG, MBX, MBS and other email file formats. Handles mailbox files and complete email archives.

Batch Email Processing

Convert thousands of emails simultaneously with high-speed batch processing. Process entire mailboxes and multiple accounts in one operation.

Complete Attachment Preservation

Preserves all email attachments including documents, images, PDFs, spreadsheets, archives (ZIP, RAR), videos and embedded inline images.

Folder Hierarchy Retention

Maintains complete email folder structure including Inbox, Sent, Drafts, custom folders, subfolders and nested directory hierarchies.

Email Header Preservation

Retains all email headers including From, To, CC, BCC, Subject, Date, Message-ID, X-Headers, MIME headers and routing information.

Advanced Date Range Filter

Filter emails by specific date range, time period or custom dates. Export only emails from a particular quarter, year or between specific dates.

Sender & Recipient Filter

Filter by email address, domain name, sender or recipient. Export only emails from specific contacts, clients or organizations.

Subject Line Search Filter

Search and filter emails by subject keywords, phrases or text patterns. Export only emails containing specific topics or project names.

Custom File Naming Options

Configure output filenames using Subject, Date, Sender, Message-ID or custom naming patterns for easy file management.

Built-in Email Preview

Preview emails before conversion with full message body, HTML formatting, attachments list and header details.

Read/Unread Status Retention

Preserves email read/unread status, flagged messages, starred items, priority markers and importance levels.

100% Offline Processing

Complete offline email conversion with no internet required. Your emails are processed locally, never uploaded to external servers.

Full Unicode & Multi-Language

Complete support for Unicode characters, international languages, Chinese, Japanese, Korean, Arabic, Hebrew, Cyrillic.

Large Mailbox Handling

Efficiently processes large MBOX files, oversized PST archives, mailboxes with 100,000+ emails. Optimized memory management.

Duplicate Email Detection

Automatically identifies and removes duplicate emails based on Message-ID, content hash or custom criteria.

Output Split Options

Split converted output by size (MB/GB), email count, date, folder or year. Create manageable archive chunks.

Forensic Analysis Mode

Export emails with complete forensic metadata, MD5/SHA hash verification, chain of custody information for legal discovery.

Keeps Email Details Intact

Original headers, real sent and received dates, sender and receiver names and message IDs stay the same. Nothing is changed during conversion.

Saves Folders and Attachments

Full folders export with every attachment in place. The mailbox stays in the same order you found it.

Export to PDF for Review

Save email as PDF for case files and legal review. Export to EML or MBOX when you need to load mail into other forensic tools.

Extract Evidence Data

Pull email addresses, phone numbers, attachments and contact photos straight from a mailbox for quick lead work.

Handles Large Evidence Sets

Big data files and live accounts process one folder at a time. Large mailboxes finish without dropped items.

Runs on Your Own Machine

This is a Windows desktop tool. Your evidence stays on your computer and never goes to a third party.